Find the appropriate word for blank D ........

Direction: In the following passage, there are blanks, each followed by a word given in bold. All these bold words are jumbled and do not necessarily fit in the blank against them. Find the appropriate fit for every blank and mark the answer accordingly. If none of the bold words fit in the blank, mark option E, "None of these" as the answer. 

Cloud computing is a method for delivering information technology (IT) services in which resources are (A) (viable) from the Internet through web-based tools and applications, as opposed to a direct connection to a server. Rather than keeping files on a (B) (seamless) hard drive or local storage device, cloud-based storage makes it possible to save them to a remote database. As long as an electronic device has access to the web, it has access to the data and the software programs to run it. The rise of cloud-based software has offered companies from all sectors several benefits, including the ability to use software from any device, either via a native app or a browser. As a result, users can carry their files and settings to other devices in a completely (C) (proprietary) manner. Cloud computing offers big businesses some serious cost-saving potential. Before the cloud became a (D) (tangible) alternative, companies were required to purchase, construct and maintain costly information management technology and infrastructure. Now, instead of investing millions in huge server centres, a firm can use "lite" versions of workstations with (E) (retrieved) fast internet connections. The cloud-like structure allows users to upgrade software more quickly – because software companies can offer their products via the web rather than through more traditional, (F) (lightning) methods involving discs or flash drives.

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